The first multi-colour light curve models and period studies for the totally eclipsing W UMa stars TYC3700-1384-1, V1511Her andV1179Her are presented. All three stars are A-subtype W UMa stars of spectral type F. The light curve solutions show that TYC 3700-1384-1 has a moderately low mass ratio of q = 0.182 ± 0.001 and a degree of overcontact of f = 49%. For V1179 Her a mass ratio q = 0.153 ± 0.001 and a degree of overcontact of f = 48% is derived. The solution for V1511 Her is inconclusive, however the mass ratio is expected to be between 0.13 < q < 0.15. The evolutionary status is compared with zero-age main sequence stars taking into account energy transfer from the primary to the secondary component. The primary component of TYC 3700-1384-1 fits well in the main-sequence, while V1179 Her is more evolved. The period study reveals for all three stars a continuously increasing period at a rate of dP/dt = 6.1 × 10−7dyr−1, dP/dt = 5.0 × 10−7dyr−1 and dP/dt = 9.6 × 10−7dyr−1 for TYC 3700-1384-1, V1511 Her and V1179 Her respectively. The estimated mass transfer rates derived from these period changes are ¤ M = 1.6 × 10−7M yr−1 for TYC 3700-1384-1 and ¤ M = 1.9 × 10−7M yr−1 for V1179 Her.

中文翻译：

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三颗完全日食 W UMa 星的光度分析随着周期的增加：TYC 3700-1384-1、V1511 Her 和 V1179 Her

第一个多色光变曲线模型和周期研究被提出用于完全日食的 W UMa 星 TYC3700-1384-1、V1511Her 和 V1179Her。所有三颗星都是光谱类型为 F 的 A 亚型 W UMa 星。光变曲线解表明 TYC 3700-1384-1 具有中等偏低的 q = 0.182 ± 0.001 质量比和 f = 49% 的过度接触程度。对于 V1179 Her，推导出质量比 q = 0.153 ± 0.001 和 f = 48% 的过度接触程度。V1511 Her 的解是不确定的，但是质量比预计在 0.13 < q < 0.15 之间。考虑到能量从主要成分到次要成分的转移，将演化状态与零年龄主序星进行了比较。TYC 3700-1384-1 的主要组件非常适合主序列，而 V1179 Her 则更加进化。周期研究表明，所有三颗恒星的周期都以 dP/dt = 6.1 × 10−7dyr−1、dP/dt = 5.0 × 10−7dyr−1 和 dP/dt = 9.6 × 10−7dyr− 的速率持续增加。 1 分别代表 TYC 3700-1384-1、V1511 Her 和 V1179 Her。从这些周期变化推导出的估计传质速率是 TYC 3700-1384-1 的 ¤ M = 1.6 × 10−7M yr−1 和 V1179 Her 的 ¤ M = 1.9 × 10−7M yr−1。